Chinese-owned Yashili International Holdings will collaborate with French dairy giant Danone on its new $212 million plant in Auckland, as part of a wider deal for the Chinese milk formula maker to buy Danone's Dumex China brand amid tightening competition in the world's largest infant formula market. Yashili, which is 25 percent-owned by Danone and one of China's top 10 infant formula makers by sales, said it plans to acquire Dumex Baby Food for an undisclosed amount.